A pattern emerges ...

Apparently "huo" and "gan" have a very similar character! (I actually don't see it, but folks tell me there's a one stroke difference)

So that means that the description of Yongchen that I was pondering was (leaving out the tonal references b/c I'm lazy): Dui tu'an gan xing qu

Which essentially translates to interested in patterns.

I love having that extra bit of detail, because I can put it to use when picking out books to take with us when we go to bring her home!